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Technical Data Sheet
PartsTable / COMPONENT / 88-20A
88-20A ✓ 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 MICROCIRCUIT,DIGITAL is a the manufacturer industrial component. Key specifications include body_width: 0.320 INCHES MAXIMUM IN, head_style: HEXAGON, body_height: 0.290 INCHES MAXIMUM IN, body_length: 0.785 INCHES MAXIMUM IN, grip_length: 1.296 INCHES MINIMUM AND 1.328 INCHES MAXIMUM IN, head_height: 0.265 INCHES MINIMUM AND 0.297 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-638-8397, 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
88-20A
NSN: 5306-00-638-8397
FSC: 5306
CAGE: 80049 — DEPARTMENT OF THE AIR FORCE (USA)
SPECIFICATIONS
materialSTEEL COMP 4037 OR STEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 8740 OR STEEL COMP 4140 OVERALL
body_width0.320 INCHES MAXIMUM IN
head_styleHEXAGON
body_height0.290 INCHES MAXIMUM IN
body_length0.785 INCHES MAXIMUM IN
grip_length1.296 INCHES MINIMUM AND 1.328 INCHES MAXIMUM IN
head_height0.265 INCHES MINIMUM AND 0.297 INCHES MAXIMUM IN
thread_class3A A
thread_length0.750 INCHES MINIMUM AND 0.829 INCHES MAXIMUM IN
fastener_length2.078 INCHES MINIMUM AND 2.125 INCHES MAXIMUM IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
NSN5306-00-638-8397
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 88-20A · 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
•
GRIP LENGTH: 1.296 INCHES MINIMUM AND 1.328 INCHES MAXIMUM IN
•
WIDTH BETWEEN FLATS: 0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-6812 MIL SPEC ALL MATERIAL RESPONSES OVERALL
•
MATERIAL: STEEL COMP 4037 OR STEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 8740 OR STEEL COMP 4140 OVERALL
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
•
FEATURES PROVIDED: FINISHED HEAD
•
THREAD CLASS: 3A A
TECHNICAL CHARACTERISTICS (FLIS)
GRIP LENGTH1.296 INCHES MINIMUM AND 1.328 INCHES MAXIMUM IN
WIDTH BETWEEN FLATS0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-6812 MIL SPEC ALL MATERIAL RESPONSES OVERALL
MATERIALSTEEL COMP 4037 OR STEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 8740 OR STEEL COMP 4140 OVERALL
NOMINAL THREAD DIAMETER0.500 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
THREAD CLASS3A A
THREAD QUANTITY PER INCH20
FASTENER LENGTH2.078 INCHES MINIMUM AND 2.125 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
AN7CH12AInterchangeable
interchangeable cross-reference
interchangeable
NASM3 THRU 20Interchangeable
interchangeable cross-reference
interchangeable
AN12-43AInterchangeable
interchangeable cross-reference
interchangeable
5306005902700Interchangeable
interchangeable cross-reference
interchangeable
8820AInterchangeable
interchangeable cross-reference
interchangeable
DS8820AFInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 88-20A?
88-20A is a MICROCIRCUIT,DIGITAL.
What parts can replace 88-20A?
There are 11 known substitutes for 88-20A: AN7CH12A, NASM3 THRU 20, AN12-43A and 8 more. Substitute compatibility should be verified for your specific system.
Is 88-20A still available?
88-20A is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026