SM-B-20866 — THUMBSCREW

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

SM-B-20866: THUMBSCREW.

The THUMBSCREW is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, head_style: THUMB NO. 4, head_height: 0.875 INCHES NOMINAL IN, point_style: CONE, point_length: 0.125 INCHES NOMINAL IN, thread_class: 2A A.

This part is cataloged in the U.S. Government catalog under NSN 5305-01-080-0676, 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

SM-B-20866

NSN: 5305-01-080-0676
FSC: 5305 — Screws
CAGE: 29381 — GICHNER SYSTEMS GROUP, INC. DIV C5ISR DIVISION (USA)

SPECIFICATIONS

material	STEEL COMP 304 OVERALL
head_style	THUMB NO. 4
head_height	0.875 INCHES NOMINAL IN
point_style	CONE
point_length	0.125 INCHES NOMINAL IN
thread_class	2A A
thread_length	0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
fastener_length	2.281 INCHES MINIMUM AND 2.312 INCHES MAXIMUM IN
thread_direction	RIGHT-HAND
surface_treatment	PASSIVATE OVERALL
point_chamfer_angle	90.0 DEGREES NOMINAL
width_between_flats	1.062 INCHES NOMINAL IN
NSN	5305-01-080-0676

COMPONENT DIAGRAM

KEY FEATURES

•

HEAD HEIGHT: 0.875 INCHES NOMINAL IN

•

POINT LENGTH: 0.125 INCHES NOMINAL IN

•

FASTENER LENGTH: 2.281 INCHES MINIMUM AND 2.312 INCHES MAXIMUM IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 TY 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

THREAD LENGTH: 0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL

•

POINT CHAMFER ANGLE: 90.0 DEGREES NOMINAL

•

FIRST DIAMETER FROM HEAD: 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN

TECHNICAL CHARACTERISTICS

HEAD HEIGHT	0.875 INCHES NOMINAL IN
POINT LENGTH	0.125 INCHES NOMINAL IN
FASTENER LENGTH	2.281 INCHES MINIMUM AND 2.312 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 TY 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH	0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-763 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
POINT CHAMFER ANGLE	90.0 DEGREES NOMINAL
FIRST DIAMETER FROM HEAD	0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER	0.250 INCHES IN
HEAD STYLE	THUMB NO. 4

OTHER ITEMS IN FSC 5305 — Screws

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

5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831

SUBSTITUTES & CROSS-REFERENCES 2

6000967-1Reference document

Same NSN cross-reference

Reference document — Secondary reference

6000967Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is SM-B-20866?

SM-B-20866 is a THUMBSCREW.

What parts can replace SM-B-20866?

There are 2 known substitutes for SM-B-20866: 6000967-1, 6000967. Substitute compatibility should be verified for your specific system.

What is the NSN for SM-B-20866?

SM-B-20866 is cataloged in the U.S. Government catalog under NSN 5305-01-080-0676. This indicates validated use in U.S. government and defense supply chains.

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