PartsTable
Technical Data Sheet
Download PDF

7M20A20 — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

7M20A20: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, nut_style: ROUND, nut_diameter: 1.742 INCHES MINIMUM AND 1.758 INCHES MAXIMUM IN, thread_class: 3B, nut_thickness: 0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-200-1103, 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
7M20A20
NSN: 5310-00-200-1103
FSC: 5310 — Nuts and Washers
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
nut_styleROUND
nut_diameter1.742 INCHES MINIMUM AND 1.758 INCHES MAXIMUM IN
thread_class3B
nut_thickness0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
thread_seriesUNF
special_features4 HOLES 0.063 IN. DIA EQUALLY SPACED 45 DEG FROM DRIVE POINT ON SURFACE THROUGH SIDE IN
thread_directionRIGHT-HAND
drive_point_depth0.124 INCHES NOMINAL IN
drive_point_width0.120 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
surface_treatmentANODIZE OVERALL
nominal_thread_size1.250 INCHES IN
NSN5310-00-200-1103
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7M20A20 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNF
•
DRIVE POINT WIDTH: 0.120 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.250 INCHES IN
•
NUT DIAMETER: 1.742 INCHES MINIMUM AND 1.758 INCHES MAXIMUM IN
•
DRIVE POINT DEPTH: 0.124 INCHES NOMINAL IN
•
NUT THICKNESS: 0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNF
DRIVE POINT WIDTH0.120 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.250 INCHES IN
NUT DIAMETER1.742 INCHES MINIMUM AND 1.758 INCHES MAXIMUM IN
DRIVE POINT DEPTH0.124 INCHES NOMINAL IN
NUT THICKNESS0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
SPECIAL FEATURES4 HOLES 0.063 IN. DIA EQUALLY SPACED 45 DEG FROM DRIVE POINT ON SURFACE THROUGH SIDE IN
SURFACE TREATMENTANODIZE OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
7M20-20Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 7M20A20?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 7M20A20?
7M20A20 is a NUT,PLAIN,ROUND.
What parts can replace 7M20A20?
There is 1 known substitute for 7M20A20: 7M20-20. Substitute compatibility should be verified for your specific system.
What is the NSN for 7M20A20?
7M20A20 is cataloged in the U.S. Government catalog under NSN 5310-00-200-1103. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 7M20A20

✓ 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.