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Technical Data Sheet
PartsTable / COMPONENT / MIL-S-971
MIL-S-971 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,WOOD is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, head_style: OVAL COUNTERSUNK, head_height: 0.123 INCHES MINIMUM AND 0.137 INCHES MAXIMUM IN, head_diameter: 0.195 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN, fastener_length: 0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN, special_features: MATERIAL BRASS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-011-6545, 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
MIL-S-971
NSN: 5305-00-011-6545
FSC: 5305
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
head_styleOVAL COUNTERSUNK
head_height0.123 INCHES MINIMUM AND 0.137 INCHES MAXIMUM IN
head_diameter0.195 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
fastener_length0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
special_featuresMATERIAL BRASS
countersink_angle80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
surface_treatmentCHROMIUM OVERALL
internal_drive_styleSLOT
nonmachine_thread_styleGIMLET POINT (TYPE A, AB OR BA)
nondefinitive_spec/std_data1 TYPE AND 6S STYLE
nonmachine_nominal_thread_diameter0.112 INCHES IN
NSN5305-00-011-6545
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MIL-S-971 · 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
•
INTERNAL DRIVE STYLE: SLOT
•
HEAD STYLE: OVAL COUNTERSUNK
•
NONMACHINE NOMINAL THREAD DIAMETER: 0.112 INCHES IN
•
SURFACE TREATMENT: CHROMIUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-613,COMP 6 OR 7 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626,COMP 6 OR 7 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NONMACHINE THREAD STYLE: GIMLET POINT (TYPE A, AB OR BA)
•
MATERIAL: COPPER ALLOY OVERALL
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 6S STYLE
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL DRIVE STYLESLOT
HEAD STYLEOVAL COUNTERSUNK
NONMACHINE NOMINAL THREAD DIAMETER0.112 INCHES IN
SURFACE TREATMENTCHROMIUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-613,COMP 6 OR 7 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626,COMP 6 OR 7 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NONMACHINE THREAD STYLEGIMLET POINT (TYPE A, AB OR BA)
MATERIALCOPPER ALLOY OVERALL
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 6S STYLE
COUNTERSINK ANGLE80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
FASTENER LENGTH0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
MIL-S-971Interchangeable
interchangeable cross-reference
interchangeable
MILS971TYPECInterchangeable
interchangeable cross-reference
interchangeable
150976Interchangeable
interchangeable cross-reference
interchangeable
ANSI B18.6.1Interchangeable
interchangeable cross-reference
interchangeable
MS35493-265Interchangeable
interchangeable cross-reference
interchangeable
B18.6.1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-S-971?
MIL-S-971 is a SCREW,WOOD.
What parts can replace MIL-S-971?
There are 10 known substitutes for MIL-S-971: MIL-S-971, MILS971TYPEC, 150976 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-S-971?
MIL-S-971 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-011-6545. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026