FFB561 — SCREW,LAG

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

FFB561: SCREW,LAG.

The SCREW,LAG is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 0.226 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER, fastener_length: 1.750 INCHES NOMINAL IN, hardness_rating: 60.0 ROCKWELL B MINIMUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-009-1797, 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

FFB561

NSN: 5305-00-009-1797
NIINs: 000091797, 000102295, 000102307, 000102315, 001450821, 001450933, 001451047, 001451064, 001503136, 001503270, 001775428, 001775505, 001775542, 001775578, 001775622, 001775623, 001775624, 001775625, 002419279, 002521488, 002521525, 002521533, 002521538, 002565152, 004025741, 004025742, 004025745, 004025746, 004025747, 004025748, 004025749, 004025750, 004025751, 004025752, 004025756, 004025757, 004025759, 004025761, 004025762, 004025763, 004025764, 004025765, 004025768, 004025822, 004025823, 004025824, 004062167, 004065178, 004065204, 004065206, 004067756, 004069211, 004069212, 004069213, 004069217, 004069218, 004069219, 004069220, 004069221, 004069222, 004069224, 004069225, 004069226, 004069229, 004069232, 004069233, 004069234, 004069235, 004069237, 004118993, 004118995, 004129767, 004129769, 004129772, 004129774, 004129786, 004129787, 004129788, 004129791, 004129793, 004129796, 004129797, 004129798, 004134747, 004310957, 005086148, 006876613, 009645940, 010086675, 011173371
FSC: 5305 — Screws
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)

SPECIFICATIONS

material	STEEL OVERALL
head_style	HEXAGON
head_height	0.226 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN
shoulder_shape	ROUND FIRST SHOULDER
fastener_length	1.750 INCHES NOMINAL IN
hardness_rating	60.0 ROCKWELL B MINIMUM OVERALL
shoulder_length	0.125 INCHES MINIMUM FIRST SHOULDER IN
special_features	THREADS: 9 THREADS PER INCH
shoulder_diameter	0.360 INCHES MINIMUM AND 0.388 INCHES MAXIMUM FIRST SHOULDER IN
surface_treatment	ZINC OVERALL
width_between_flats	0.544 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
nonmachine_thread_style	GIMLET POINT (TYPE A, AB OR BA)
NSN	5305-00-009-1797

COMPONENT DIAGRAM

KEY FEATURES

•

NONMACHINE NOMINAL THREAD DIAMETER: 0.250 INCHES IN

•

HEAD HEIGHT: 0.150 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN

•

FASTENER LENGTH: 5.000 INCHES NOMINAL IN

•

SHOULDER LENGTH: 0.094 INCHES MINIMUM FIRST SHOULDER IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM A153-60 ASSN STD SINGLE TREATMENT RESPONSE OVERALL

•

SHOULDER DIAMETER: 0.237 INCHES MINIMUM AND 0.260 INCHES MAXIMUM FIRST SHOULDER IN

•

SHOULDER SHAPE: ROUND FIRST SHOULDER

•

HARDNESS RATING: 60.0 ROCKWELL C NOMINAL OVERALL

TECHNICAL CHARACTERISTICS

NONMACHINE NOMINAL THREAD DIAMETER	0.250 INCHES IN
HEAD HEIGHT	0.150 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
FASTENER LENGTH	5.000 INCHES NOMINAL IN
SHOULDER LENGTH	0.094 INCHES MINIMUM FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	ASTM A153-60 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER	0.237 INCHES MINIMUM AND 0.260 INCHES MAXIMUM FIRST SHOULDER IN
SHOULDER SHAPE	ROUND FIRST SHOULDER
HARDNESS RATING	60.0 ROCKWELL C NOMINAL OVERALL
NONMACHINE THREAD STYLE	GIMLET POINT (TYPE A, AB OR BA)
MATERIAL DOCUMENT AND CLASSIFICATION	FF-B-561,GRADE B FED SPEC SINGLE MATERIAL RESPONSE OVERALL

OTHER ITEMS IN FSC 5305 — Screws

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

5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753

SUBSTITUTES & CROSS-REFERENCES 1

MS16992-511Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

Ready to buy FFB561?

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 FFB561?

FFB561 is a SCREW,LAG.

What parts can replace FFB561?

There is 1 known substitute for FFB561: MS16992-511. Substitute compatibility should be verified for your specific system.

What is the NSN for FFB561?

FFB561 is cataloged in the U.S. Government catalog under NSN 5305-00-009-1797. This indicates validated use in U.S. government and defense supply chains.

Community Feedback

FFB561 — SCREW,LAG

Request a Quote — FFB561