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SG2561-95 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

SG2561-95: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1524 OR STEEL COMP 1541 OVERALL, nut_style: HEXAGON, nut_height: 0.464 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNF, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-274-9795, 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
SG2561-95
NSN: 5310-00-274-9795
FSC: 5310 — Nuts and Washers
CAGE: 59180 — CIRCOR PUMPS NORTH AMERICA LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 1524 OR STEEL COMP 1541 OVERALL
nut_styleHEXAGON
nut_height0.464 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
width_across_flats0.850 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
nominal_thread_size0.500 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
thread_quantity_per_inch20
nondefinitive_spec/std_data2 TYPE AND 11 STYLE
departure_from_cited_designatorAS MODIFIED BY MATERIAL
NSN5310-00-274-9795
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SG2561-95 · 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
•
WIDTH ACROSS FLATS: 0.850 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-W-409 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
DEPARTURE FROM CITED DESIGNATOR: AS MODIFIED BY MATERIAL
•
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 11 STYLE
•
NUT HEIGHT: 0.464 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.850 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-409 FED SPEC ALL MATERIAL RESPONSES OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.500 INCHES IN
DEPARTURE FROM CITED DESIGNATORAS MODIFIED BY MATERIAL
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 11 STYLE
NUT HEIGHT0.464 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN
NUT STYLEHEXAGON
THREAD CLASS2B
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 2
021-00483Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
FFN836Reference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is SG2561-95?
SG2561-95 is a NUT,PLAIN,HEXAGON.
What parts can replace SG2561-95?
There are 2 known substitutes for SG2561-95: 021-00483, FFN836. Substitute compatibility should be verified for your specific system.
What is the NSN for SG2561-95?
SG2561-95 is cataloged in the U.S. Government catalog under NSN 5310-00-274-9795. 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.