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A286 CRES Keylocking Threaded Inserts Lightweight – Inch

Material:
Insert – A286 CRES (140 KSI Min)
Keys- 302 CRES
Finish: Passivated
Tolerances: ±.010 inch unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions below are in inches
Keys: Inserts with an internal thread size of 5/16 and larger are furnished with 4 locking keys. Smaller sizes have 2 locking keys.
Material Identification Mark: One line on top of insert
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914A (MS51830 & NAS1394)

A286 CRES Keylocking Threaded Inserts Heavy Duty- Inch

Material:
Insert – A286 CRES (140 KSI Min)
Keys- 302 CRES
Finish: Passivated
Tolerances: ±.010 inch unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions below are in inches
Keys: Inserts with an internal thread size of 5/16 and larger are furnished with 4 locking keys. Smaller sizes have 2 locking keys.
Material Identification Mark: One line on top of insert
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914A (MS51831& NAS1395)

303 CRES Keylocking Threaded Inserts Heavy Duty- Inch

Material:
Insert – 303 CRES
Keys- 302 CRES
Finish: Passivated
Tolerances: ±.010 inch unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions below are in inches
Keys: Inserts with an internal thread size of 5/16 and larger are furnished with 4 locking keys. Smaller sizes have 2 locking keys.
Material Identification Mark: None
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914A (MS51831& NAS1395)

A286 CRES Keylocking Threaded Inserts Lightweight – Metric

Material:
Insert – A286 CRES (140 KSI Min)
Keys- 302 CRES
Finish: Passivated
Tolerances: ±.25 mm unless specified otherwise
Internal Threads: Per Fed Std H28/21, MJ Form
Dimensions: All dimensions below are in millimeters
Keys: Inserts with an internal thread size of M6 and smaller are furnished with 2 locking keys. Larger sizes have 4 locking keys.
Material Identification Mark: One line on top of insert
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: NA0149

303 CRES Keylocking Threaded Inserts Lightweight – Metric

Material:
Insert – 303 CRES
Keys- 302 CRES
Finish: Passivated
Tolerances: ±.25 mm unless specified otherwise
Internal Threads: Per Fed Std. H28/21, MJ Form
Dimensions: All dimensions below are in millimeters
Keys: Inserts with an internal thread size of M6 and smaller are furnished with 2 locking keys. Larger sizes have 4 locking keys.
Material Identification Mark: None
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: There is no National Aerospace Standard for Metric Keylocking Inserts manufactured from 303 CRES. The inserts are compliant with the other requirements of NA0147, NA1049, and NA0151 except for any references to the type of matrial or performance related to the material.

4140 Alloy Steel Keylocking Threaded Inserts Lightweight – Inch

Material:
Insert – 4140 Alloy Steel (160 KSI Min)
Keys- 302 CRES
Finish: Cadmium Plate (QQ-P-416 Type II, Cl. 2)
Tolerances: ±.010 inch unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions below are in inches
Keys: Inserts with an internal thread size of 5/16 and larger are furnished with 4 locking keys. Smaller sizes have 2 locking keys.
Material Identification Mark: Two lines on top of insert
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914A (MS51830 & NAS1394)

303 CRES Keylocking Threaded Inserts Lightweight – Inch

Material:
Insert – 303 CRES
Keys- 302 CRES
Finish: Passivated
Tolerances: ±.010 inch unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions below are in inches
Keys: Inserts with an internal thread size of 5/16 and larger are furnished with 4 locking keys. Smaller sizes have 2 locking keys.
Material Identification Mark: None
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914A (MS51830 & NAS1394)

4140 Alloy Steel Keylocking Threaded Inserts Heavy Duty- Inch

Material:
Insert – 4140 Alloy Steel (160 KSI Min)
Keys- 302 CRES
Finish: Cadmium Plate (QQ-P-416, Type II, Cl. 2)
Tolerances: ±.010 inch unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions below are in inches
Keys: Inserts with an internal thread size of 5/16 and larger are furnished with 4 locking keys. Smaller sizes have 2 locking keys.
Material Identification Mark: Two lines on top of insert
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914A (MS51831& NAS1395)

303 CRES Keylocking Threaded Inserts Heavy Duty- Metric

Material:
Insert – 303 CRES
Keys- 302 CRESFinish: Passivated
Tolerances: ±.25 mm unless specified otherwise
Internal Threads: Per Fed Std H28/21, MJ Form
Dimensions: All dimensions below are in millimeters
Keys: Inserts with an internal thread size of M6 and smaller are furnished with 2 locking keys. Larger sizes have 4 locking keys.
Material Identification Mark: None
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: There is no National Aerospace Standard for Metric Keylocking Inserts manufactured from 303 CRES. The inserts are compliant with the other requirements of NA0147, NA0149, and NA0151 except for any references to the type of material or performance related to the material.

A286 CRES Keylocking Threaded Inserts Heavy Duty- Metric

Material:
Insert – A286 CRES (140 KSI Min)
Keys- 302 CRES
Finish: Passivated
Tolerances: ±.25 mm unless specified otherwise
Internal Threads: Per Fed Std H28/21, MJ Form
Dimensions: All dimensions below are in millimeters
Keys: Inserts with an internal thread size of M6 and smaller are furnished with 2 locking keys. Larger sizes have 4 locking keys.
Material Identification Mark: One line on top of insert
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: NA0151

4140 Alloy Steel Keylocking Threaded Inserts Heavy Duty- Metric

Material:
Insert – 4140 Alloy Steel (160 KSI Min)
Keys- 302 CRES
Finish: Cadmium Plate (QQ-P-416 Type II, Cl. 2)
Tolerances: ±.25 mm unless specified otherwise
Internal Threads: Per Fed Std H28/21, MJ Form
Dimensions: All dimensions below are in millimeters
Keys: Inserts with an internal thread size of M6 and smaller are furnished with 2 locking keys. Larger sizes have 4 locking keys.
Material Identification Mark: Two lines on top of insert
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: NA0150

303 CRES Keylocking Threaded Inserts Extra Heavy Duty- Inch

Material:
Insert – 303 CRES
Keys- 302 CRES
Finish: Passivated
Tolerances: ±.010 inch unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions below are in inches
Keys: Inserts with an internal thread size of 1/4 and larger are furnished with 4 locking keys. Smaller sizes have 2 locking keys.
Material Identification Mark: None
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914A (MS51832)

A286 CRES Keylocking Threaded Inserts Extra Heavy Duty- Inch

Material:
Insert – A286 CRES (140 KSI Min)
Keys- 302 CRES
Finish: Passivated
Tolerances: ±.010 inch unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions below are in inches
Keys: Inserts with an internal thread size of 1/4 and larger are furnished with 4 locking keys. Smaller sizes have 2 locking keys.
Material Identification Mark: One line on top of insert
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914A (MS51832)

4140 Alloy Steel Keylocking Threaded Inserts Extra Heavy Duty- Inch

Material:
Insert – 4140 Alloy Steel (160 KSI Min)
Keys- 302 CRES
Finish: Cadmium Plate (QQ-P-416 Type II, Cl.2)
Tolerances: ±.010 inch unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions below are in inches
Keys: Inserts with an internal thread size of 1/4 and larger are furnished with 4 locking keys. Smaller sizes have 2 locking keys.
Material Identification Mark: Two lines on top of insert
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914A (MS51832)

NAS Style – 303 CRES Integral Key Inserts

Material: 303 CRES
Finish: Passivated
Tolerances: ±.010 unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions are in inches
Keys: Integral key inserts are furnished with 2 locking keys.
Material Identification Mark: None
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914 (NAS1394 and NAS1395).

NAS Style – A286 CRES Integral Key Inserts

Material: A286 CRES
Finish: Passivated
Tolerances: ±.010 unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions are in inches
Keys: Integral key inserts are furnished with 2 locking keys.
Material Identification Mark: None
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914 (NAS1394 and NAS1395).

NAS Style – 4140 Alloy Steel Integral Key Inserts

Material: 4140 Alloy Steel (160 KSI Min.)
Finish: Cadmium Plate (QQ-P-416 Type II, CI. 2)
Tolerances: ±.010 unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions are in inches
Keys: Integral key inserts are furnished with 2 locking keys.
Material Identification Mark: None
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914 (NAS1394 and NAS1395).

Material
011 – 17 – 4 PH STL
022 – 4130 STL Finish Cad Plate & DFL
031 – A286 SS Finish DFL
033 – A286 Finish Passivated

Thread Combination is determined by:
Internal Thread Class 3B + External Thread Class 2A

Internal Lock
L – Locking Feature
Blank – no locking

Dash #	Dim “L”
-5	.312
-6	.375
-7	.438
-8	.500
-9	.562
-10	.625
-11	.688
-12	.750
-13	.812
-14	.875
-15	.938
-16	1.00
-17	1.062
-18	1.125
-19	1.188
-20	1.250
-21	1.312
-22	1.375
-23	1.438
-24	1.500
-25	1.562
-26	1.625

Dash #	Dim “L”
-27	1.688
-28	1.750
-29	1.812
-30	1.875
-31	1.937
-32	2.000
-34	2.125
-36	2.250
-38	2.375
-40	2.500
-42	2.625
-44	2.750
-46	2.875
-48	3.000
-50	3.125
-52	3.250
-54	3.375
-56	3.500
-58	3.625
-60	3.750
-62	3.875
-64	4.000

Thread Combination is determined by:
Nut End Thread Class 3A + Stud End Thread Class 2A

“D” – Crosshole
Dash – No crosshole

Material
096 – 303 Stainless Steel
097 – A286 Stainless Steel
098 – 4140 Steel

4140 Alloy Steel Keylocking Threaded Inserts Lightweight – Metric

Material:
Insert – 4140 Alloy Steel (160 KSI Min)
Keys- 302 CRES
Finish: Cadmium Plate (QQ-P-416 Type II, Cl. 2)
Tolerances: ±.25 mm unless specified otherwise
Internal Threads: Per Fed Std H28/21, MJ Form
Dimensions: All dimensions below are in millimeters
Keys: Inserts with an internal thread size of M6 and smaller are furnished with 2 locking keys. Larger sizes have 4 locking keys.
Material Identification Mark: Two lines on top of insert
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: NA0148

4140 Alloy Steel Keylocking Threaded Inserts Miniature – Metric

Material:
Insert – 4140 Alloy Steel (160 KSI Min)
Keys- 302 CRES
Finish: Cadmium Plate (QQ-P-416 Type II, Cl. 2)
Tolerances: ±.25 mm unless specified otherwise
Internal Threads: Per Fed Std H28/21, MJ Form
Dimensions: All dimensions below are in millimeters
Keys: Miniature inserts are furnished with 2 locking keys
Material Identification Mark: Two lines on top of insert
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: NA0146

A286 CRES Keylocking Threaded Inserts Miniature – Metric

Material:
Insert – A286 CRES (140 KSI Min)
Keys- 302 CRES
Finish: Passivated
Tolerances: ±.25 mm unless specified otherwise
Internal Threads: Per Fed Std H28/21, MJ Form
Dimensions: All dimensions below are in metric
Keys: Miniature inserts are furnished with 2 locking keys
Material Identification Mark: One line on top of insert
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: NA0147

303 CRES Keylocking Threaded Inserts Miniature – Metric

Material:
Insert – 303 CRES
Keys- 302 CRES
Finish: Passivated
Tolerances: ±.25 mm unless specified otherwise
Internal Threads: Per Fed Std H28/21, MJ Form
Dimensions: All dimensions below are in millimeters
Keys: Miniature inserts are furnished with 2 locking keys
Material Identification Mark: None
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: There is no National Aerospace Standard for Metric Keylocking Inserts manufactured from 303 CRES. The inserts are compliant with the other requirements of NA0147, NA0149, and NA0151 except for any references to the type of material or performance related to the material.

4140 Alloy Steel Keylocking Threaded Inserts Miniature – Inch

Material:
Insert – 4140 Alloy Steel (160 KSI Min)
Keys- 302 CRES
Finish: Cadmium Plate (QQ-P-416 Type II, Cl. 2)
Tolerances: ±.010 inch unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions below are in inches
Keys: Miniature inserts are furnished with 2 locking keys
Material Identification Mark: Two lines on top of insert
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914A (MS51830)

A286 CRES Keylocking Threaded Inserts Miniature – Inch

Material:
Insert – A286 CRES (140 KSI Min)
Keys- 302 CRES
Finish: Passivated
Tolerances: ±.010 inch unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions below are in inches
Keys: Miniature inserts are furnished with 2 locking keys
Material Identification Mark: One line on top of insert
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914A (MS51830)

Specification for 303 CRES Keylocking Threaded Inserts Miniature – Inch

Material:
Insert – 303 CRES
Keys- 302 CRES
Finish: Passivated
Tolerances: ±.010 inch unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions below are in inches
Keys: Miniature inserts are furnished with 2 locking keys
Material Identification Mark: None
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914A (MS51830)

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