Model: MS16998-28

Socket Head Cap Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.533 inches and 0.625 inches
Fastener Length
Between 0.595 inches and 0.625 inches
Head Style
Flat chamfer
Head Diameter
Between 0.303 inches and 0.312 inches
Head Height
Between 0.185 inches and 0.190 inches
Internal Drive Style
Hexagon
End Application
W/s: aircraft, c-2a (reprocured); engine, aircraft tf33-pw-102 (c-135e, ec-135h/k/p); engine aircraft tf33-p-3/5/9 (c/ec-135, b-52h); aircraft (ac-130h, mc-130h, ec-130e, hc-130); missile, all-weather anti-ship, harpoon (agm-84); trainer, b-1b aircraft; torpedo, mk-48; engine, aircraft, f100 pw220 (f-15c/d/e); missile, air-to-air, phoenix (aim-54); engine, aircraft, tf33-100 (e3a/b/c)
Thread Diameter
0.190 inches
Width Across Flats
Between 0.156 inches and 0.159 inches
Thready Qty Per Inch (tpi)
32
Min. Tensile Strength (psi)
180000 pounds per square inch
Hardness Rating
36.0 rockwell c and 45.0 rockwell c
Minimum Yield Strength
155000 pounds per square inch
Material
Steel
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Ams-qq-p-416, type 2, cl 2 federal specification single treatment response
Thread Series Designator
Unrf
Specification Data
80205-nas1357 professional/industrial association standard
NSN
5305-00-058-0505
Part Number
MS16998-28
Description
Screw,cap,socket Head
CAGE
96906

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See bolt, internal wrenching. Excludes screw, shoulder; and screw, machine.

Part MS16998-28 NSN 5305-00-058-0505

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
16282
FIIG:
A003B0
Concept No.:
App. Key:
SC
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
1.0000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7318152000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment

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