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A26881-63 — BOLT,INTERNAL WRENCHING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

A26881-63: BOLT,INTERNAL WRENCHING.

The BOLT,INTERNAL WRENCHING is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_height: 0.864 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 1.293 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN, thread_length: 2.750 INCHES NOMINAL IN, fastener_length: 3.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-019-2400, 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
A26881-63
NSN: 5306-01-019-2400
FSC: 5306 — Bolts
CAGE: 13841 — TIFFIN PARTS, L.L.C. DIV SUBSIDIARY OF PETTIBONE CORP. (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_height0.864 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
thread_class3A A
head_diameter1.293 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
thread_length2.750 INCHES NOMINAL IN
fastener_length3.750 INCHES NOMINAL IN
hardness_rating38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
special_featuresSTRIP TYPE OR PATCH TYPE OR PELLET TYPE ELEMENT IN THREADS
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_across_flats0.750 INCHES NOMINAL IN
internal_drive_styleHEXAGON
NSN5306-01-019-2400
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: A26881-63 · 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
•
WIDTH ACROSS FLATS: 0.750 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.864 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
•
FASTENER LENGTH: 3.750 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
•
THREAD LENGTH: 2.750 INCHES NOMINAL IN
•
HARDNESS RATING: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.875 INCHES IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.750 INCHES NOMINAL IN
HEAD HEIGHT0.864 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
FASTENER LENGTH3.750 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
THREAD LENGTH2.750 INCHES NOMINAL IN
HARDNESS RATING38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.875 INCHES IN
THREAD DIRECTIONRIGHT-HAND
SPECIAL FEATURESSTRIP TYPE OR PATCH TYPE OR PELLET TYPE ELEMENT IN THREADS
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 A26881-63?
A26881-63 is a BOLT,INTERNAL WRENCHING.
What is the NSN for A26881-63?
A26881-63 is cataloged in the U.S. Government catalog under NSN 5306-01-019-2400. 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.