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PBF1165B4-8R — SCREW,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

PBF1165B4-8R: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT COUNTERSUNK, grip_length: 0.500 INCHES NOMINAL IN, head_height: 0.108 INCHES NOMINAL IN, thread_class: 3A A, grip_diameter: 0.2641 INCHES MINIMUM AND 0.2651 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-692-5440, 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
PBF1165B4-8R
NSN: 5305-01-692-5440
FSC: 5305 — Screws
CAGE: 27624 — SPS TECHNOLOGIES LLC DBA PB FASTENERS DIV PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT COUNTERSUNK
grip_length0.500 INCHES NOMINAL IN
head_height0.108 INCHES NOMINAL IN
thread_class3A A
grip_diameter0.2641 INCHES MINIMUM AND 0.2651 INCHES MAXIMUM IN
head_diameter0.447 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN
thread_length0.370 INCHES NOMINAL IN
surface_finish32.0 MICROINCHES OVERALL
fastener_length0.855 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN
hardness_rating46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
NSN5305-01-692-5440
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: PBF1165B4-8R · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SURFACE FINISH: 32.0 MICROINCHES OVERALL
•
HEAD HEIGHT: 0.108 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.855 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ION VAPOR DEPOSITED ALUMINUM COATING PER MIL-C-83488,TY II,CL 3 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-L-46010,TY I MIL SPEC 2ND TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.370 INCHES NOMINAL IN
•
HARDNESS RATING: 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: H11 ALLOY STEEL PER AMS6487 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OVERALL
•
SINGLE SHEAR STRENGTH: ERR-060
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES OVERALL
HEAD HEIGHT0.108 INCHES NOMINAL IN
FASTENER LENGTH0.855 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONION VAPOR DEPOSITED ALUMINUM COATING PER MIL-C-83488,TY II,CL 3 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-L-46010,TY I MIL SPEC 2ND TREATMENT RESPONSE OVERALL
THREAD LENGTH0.370 INCHES NOMINAL IN
HARDNESS RATING46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONH11 ALLOY STEEL PER AMS6487 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OVERALL
SINGLE SHEAR STRENGTHERR-060
NOMINAL THREAD DIAMETER0.2500 INCHES IN
FEATURES PROVIDEDDRY FILM LUBRICANT
SUBSTITUTES & CROSS-REFERENCES 6
121557-4-A8BXSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
VT1693AS4-8XSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
121557B4-8RReference document
Same NSN cross-reference
Reference document — Secondary reference
C7984B4-8RReference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
C7984Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
VT1693B4-8RReference document
Same NSN cross-reference
Reference document — Secondary reference
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 PBF1165B4-8R?
PBF1165B4-8R is a SCREW,CLOSE TOLERANCE.
What parts can replace PBF1165B4-8R?
There are 6 known substitutes for PBF1165B4-8R: 121557-4-A8BX, VT1693AS4-8X, 121557B4-8R and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for PBF1165B4-8R?
PBF1165B4-8R is cataloged in the U.S. Government catalog under NSN 5305-01-692-5440. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.