Nuts - GDPA Fasteners

GDPA manufactures a complete range of Nuts using Hot Forging, Drop Forging, Cold Forming, Bar Turning and Milling

Materials & Grades

Carbon Steel, Alloy Steel (Low, Medium and High). Class 4, 5, 6, 8, 10, 12
Brass
Stainless Steel A2 / A4

Our State-of-the-art Manufacturing facility comprises of Forging Machines, Temperature Controlled Billet Heaters, and a wide range of CNC machines. This flexibility allows us to deliver Nuts to a range of customers servicing them with high volume standard applications or low volume critical application product. GDPA’s Nut division is our fastest growing division servicing customers in the Mining & Tunnelling, Wind & Hydro Turbine, Engines and other Critical Application Sectors. We can produce all types of Nuts to Metric, Witworth, Unified & Trapezoidal threads in Standard & Fine pitches and unconventional thread pitches for specialised applications.

Cold Forming

Diameter M6 - M20
Inches 1/4" - 3/4"

Hot Forging

Diameter M24 - M120
Inches 1" - 4"
Our specialization - Large Diameter Critical Application Nuts

Product Range

Hex Nuts

Specifications	Grade	Thread	Dimensional Range
DIN 555/DIN 934	CLASS - 4/5/6/8/10/12	METRIC 6H,7H	M 8-M64
ISO 4032 TO 4036	CLASS - 4/5/6/8/10/12	UNC/UNF -2B	3/8" TO 3"
BS 1768/BS 1083	GR - A,P,R,T SAE, GR.2,5,8	UNC/UNF-2B/BSW/BSF	3/8" TO 3"
BS 4190 /3692	GR - A,P,R,T SAE, GR.2,5,8	UNC/UNF-2B/BSW/BSF	3/8" TO 3"
ANSI B.18.2.2	GR - A,P,R,T SAE, GR.2,5,8	UNC/UNF-2B/BSW/BSF	3/8"TO 3"
IS:1363 (PART-3)	GR - A,P,R,T SAE, GR.2,5,8	METRIC 6H,7H	M 8-M64
ISO 8673	CLASS - 4/5/6/8/10/12	METRIC 6H,7H	M 8-M64

Heavy Hex Nuts & HSFG Nuts

Specifications	Grade	Thread	Dimensional Range
DIN 6915	CLASS - 4/5/6/8/10/12/ASTM A563M	METRIC 6H,7H	M12 TO M36
ISO 7414	CLASS - 4/5/6/8/10/12/ASTM A563M	METRIC 6H,7H	M12 TO M36
ANSI B 18.2.2	GR.2/4/5/6/8/10/12	UNC/UNF-2B/BSW/BSF	1/2" TO 3"
BS 4395 I,II	CLASS - 4/5/6/8/10/12/ASTM A563M	METRIC 6H, 7H	1/2" TO 3"

Square & Round Nuts

Specifications	Grade	Thread	Dimensional Range
DIN 557/DIN 562	CLASS - 4/5/6/8	METRIC 6H, 7H	M8 TO M 33
ANSI B 18.2.2	GR - SAE GR - 2/4/5/8	UNC/UNF-2B/BSW/BSF	3/8" TO 2.1/2"

Hex Coupling Nuts

Specifications	Grade	Thread	Dimensional Range
DIN 6334/DIN 6330B	CLASS - 4/5/6/8	METRIC 6H,7H	M8 TO M64
AMERICAN SERIES	GR - SAE GR - 2/4/5/8	UNC/UNF-2B/BSW/BSF	3/8"TO 2.1/2"

Slotted / Castle Nuts

Specifications	Grade	Thread	Dimensional Range
DIN 935/DIN 937	CLASS - 4/5/6/8	METRIC 6H,7H	M8 TO M48
BAS 1083	GR - A/P/R/T	UNC/UNF-2B/BSW/BSF	3/8" TO 2"
BS 1768	GR - SAE	UNC/UNF-2B/BSW/BSF	3/8" TO 2"
ANSI B 18.2.2	GR - 2/4/5/8	UNC/UNF-2B/BSW/BSF	3/8" TO 2"

Nylon Insert Nuts

Specifications	Grade	Thread	Dimensional Range
DIN 985/DIN 982	CLASS - 4/5/6/8/10/12	METRIC 6H,7H	M12 TO M48
ESNA/NM/NE NTU NTE	GR - ASMT A563	UNC/UNF-2B/BSW/BSF	1/2" TO 2"

Hex Jam / Lock Nuts

Specifications	Grade	Thread	Dimensional Range
DIN 439/DIN 936	CLASS - 4/04/5/6/8/10/12/17H/22H	METRIC 6H,7H	M12 TO M48
ANSI B 18.2.2	GR - A/P/R/T/, GR - SAE GR - 2/4/5/8	UNC/UNF-2B/BSW/BSF	1/2" TO 2"
BS 1768	GR - A/P/R/T/, GR - SAE GR - 2/4/5/8	UNC/UNF-2B/BSW/BSF	1/2" TO 2"

Hex Flanged Nuts

Specifications	Grade	Thread	Dimensional Range
DIN 6923	CLASS - 4/5/6/8/10/12	METRIC 6H,7H	M12 TO M36

Channel / Rail Nuts

Specifications	Grade	Thread	Dimensional Range
CUSTOMER SPEC	CLASS 4,6	METRIC 6H,7H	M6 TO M 20

Tee Nuts

Specifications	Grade	Thread	Dimensional Range
DIN 508	CLASS - 4/5/6/8/10/12	METRIC 6H,7H	M8 TO M30