40S8-4-18R — STUD ASSEMBLY,TURNLOCK FASTENER

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

40S8-4-18R: STUD ASSEMBLY,TURNLOCK FASTENER.

STUD ASSEMBLY,TURNLOCK FASTENER. Key specifications include diameter: 0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN, material: STEEL OVERALL, drive_type: CROSS RECESS, eyelet_length: 0.250 INCHES NOMINAL IN, special_features: 0.913 IN. MIN 0.923 IN.

MAX 2ND LG FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD IN, stud_head_height: 0.102 INCHES NOMINAL IN. This part is cataloged in the U.S. Government catalog under NSN 5325-01-167-4378, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

40S8-4-18R

NSN: 5325-01-167-4378
FSC: 5325 — Fastening Devices
CAGE: 71286 — HOWMET GLOBAL FASTENING SYSTEMS INC DIV CAMLOC PRODUCTS (USA)

SPECIFICATIONS

diameter	0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN
material	STEEL OVERALL
drive_type	CROSS RECESS
eyelet_length	0.250 INCHES NOMINAL IN
special_features	0.913 IN. MIN 0.923 IN. MAX 2ND LG FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD IN
stud_head_height	0.102 INCHES NOMINAL IN
surface_treatment	CADMIUM AND CHROMATE OVERALL
stud_assembly_style	STUD ASSEMBLY
eyelet_outside_diameter	0.312 INCHES NOMINAL IN
turnlock_stud_head_style	STUD HEAD
surface_treatment_document_and_classification	QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
distance_from_engaging_member_to_largest_bearing_surface_of_head	0.493 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN
NSN	5325-01-167-4378

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

EYELET OUTSIDE DIAMETER: 0.312 INCHES NOMINAL IN

•

DRIVE TYPE: CROSS RECESS

•

DIAMETER: 0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN

•

STUD HEAD HEIGHT: 0.102 INCHES NOMINAL IN

•

DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD: 0.493 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN

•

TURNLOCK STUD HEAD STYLE: STUD HEAD

TECHNICAL CHARACTERISTICS

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
EYELET OUTSIDE DIAMETER	0.312 INCHES NOMINAL IN
DRIVE TYPE	CROSS RECESS
DIAMETER	0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN
STUD HEAD HEIGHT	0.102 INCHES NOMINAL IN
DISTANCE FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD	0.493 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN
TURNLOCK STUD HEAD STYLE	STUD HEAD
SPECIAL FEATURES	0.913 IN. MIN 0.923 IN. MAX 2ND LG FROM ENGAGING MEMBER TO LARGEST BEARING SURFACE OF HEAD IN
SURFACE TREATMENT	CADMIUM AND CHROMATE OVERALL
MATERIAL	STEEL OVERALL

OTHER ITEMS IN FSC 5325 — Fastening Devices

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5325-00-000-1884 5325-00-000-9988 5325-00-001-1567 5325-00-001-2043 5325-00-001-3842 5325-00-001-3858 5325-00-001-3871 5325-00-001-4317

SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 40S8-4-18R?

40S8-4-18R is a STUD ASSEMBLY,TURNLOCK FASTENER.

What is the NSN for 40S8-4-18R?

40S8-4-18R is cataloged in the U.S. Government catalog under NSN 5325-01-167-4378. This indicates validated use in U.S. government and defense supply chains.

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